Maybe; apparently he did move (according to his twitter account). However NYAV Post has studios in both LA and New York. Lisa Ortiz and Casey Mongillo are New York based so it would seem part of the dub was recorded there.

Even if he did record this role in LA I wouldn't officially call it his first LA production since he's no stranger to working on NYAV Post projects directed by Michael Sinterniklaas

An project from Bang Zoom, Studiopolis or New Generation Pictures will probably be his first real LA gig (no prior work history with any ADR Directors at those studios)

@freezeframe100 during his time at DBZ playing Goku, I wonder why he wasn't hired to do more roles for funimation. I mean he has starred in a few roles but not more considering Goku is the main protagonist.